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A New Species of Amazophrynella (Anura:Bufonidae) from the Southwestern Part of the Brazilian Guiana Shield

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A New Species of Amazophrynella (Anura:Bufonidae) from the Southwestern Part of the Brazilian Guiana Shield Zootaxa 3753 (1): 079–095 ISSN 1175-5326 (print edition) www.mapress.com/zootaxa/ Article ZOOTAXA Copyright © 2014 Magnolia Press ISSN 1175-5334 (online edition) http://dx.doi.org/10.11646/zootaxa.3753.1.7 http://zoobank.org/urn:lsid:zoobank.org:pub:753637FD-6478-4152-91B1-807250422F2B A new species of Amazophrynella (Anura:Bufonidae) from the southwestern part of the Brazilian Guiana Shield ROMMEL R. ROJAS1,2,7, VINÍCIUS TADEU DE CARVALHO1,3,4, MARCELO GORDO5, ROBSON W. ÁVILA6, IZENI PIRES FARIAS1 & TOMAS HRBEK1 1Laboratório de Evolucão e Genética Animal, Departamento de Biologia, Universidade Federal do Amazonas, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, CEP 69077-000, Manaus, AM, Brazil 2Programa de Pós-Graduação em Diversidade Biológica, Instituto de Ciências Biológicas, Universidade Federal do Amazonas, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, CEP 69077-000, Manaus, AM, Brazil 3Programa de Pós-Graduação em Biodiversidade e Biotecnologia, Instituto de Ciências Biológicas, Universidade Federal do Amazo- nas, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, CEP 69077-000, Manaus, AM, Brazil 4Instituto Nacional de Pesquisas da Amazônia, Coleção de Anfíbios e Répteis, Campus II, Av. André Araújo, 2936, Aleixo, CEP 69060- 001, Manaus, AM, Brazil 5Departamento de Biologia, ICB, Universidade Federal do Amazonas, Av. Gen. Rodrigo Octávio Jordão Ramos, 3000, CEP 69077- 000, Manaus, AM, Brazil 6Universidade Regional do Cariri, Centro de Ciências Biológicas e da Saúde, Departamento de Ciências Biológicas, Campus do Pimenta, Rua Cel. Antônio Luiz, 1161, Bairro do Pimenta, CEP 63105-100, Crato, CE, Brazil 7Corresponding author. E-mail: [email protected] Abstract Amazophrynella is a genus of the family Bufonidae, currently represented by three species. The type species of the genus, Amazophrynella minuta, however, is a complex of species occurring throughout the Amazonian biome. This group re- mains problematic taxonomically; the difficulty lays principally in the lack of diagnostic characters in the original descrip- tion of A. minuta, the lack of molecular data and refined taxonomic comparison of individuals through its wide distribution. We describe a new species of the genus Amazophrynella, distributed in the southwestern part of the Guiana Shield of Brazil based on a series of morphological and molecular characters. The new species differs from others of the genus by presenting a slightly truncated triangular snout, ventral texture covered by many fine granules, white belly cov- ered with black spots and by fifteen molecular autapomorphies in the 16S rDNA fragment. Uncorrected p-distances of a fragment of the 16S mitochondrial rDNA gene revealed high divergence among other Amazophrynella species (9%–14%). Additionally we provide a new diagnosis of topotypic material of Amazophrynella minuta including molecular data. Our results show the existence of a subestimated diversity in the genus Amazophrynella. Key words: Amphibian, Anura, Bufonidae, Amazophrynella, Brazil Resumo Amazophrynella é um gênero da família Bufonidae, atualmente representado por três espécies. Amazophrynella minuta é considerada como um complexo de espécies que se distribui por todo o bioma amazônico. Este grupo permanece taxo- nomicamente problemático, sendo as principais dificuldades a ausência de caracteres diagnósticos na descrição original de A. minuta, a inexistência de dados moleculares e comparações taxonômicas detalhadas dos indivíduos, através de sua extensa distribuição. Descrevemos uma nova espécie do gênero Amazophrynella, distribuída no sudoeste da região do es- cudo da Guiana baseados em caracteres morfológicos e moleculares. A nova espécie difere de outras do gênero por apre- sentar um focinho triangular ligeiramente truncado, textura ventral coberto por muitos grânulos finos, barriga branca coberta por manchas pretas e quinze automorfias moleculares no fragmento do 16S rDNA. As distâncias não corrigidas (p - distâncias) no fragmento 16S rDNA revelaram uma alta divergência entre as outras espécies de Amazophrynella (9%– 14%). Adicionalmente providenciamos uma nova diagnose do material topotipico de Amazophrynella minuta, incluindo dados moleculares. Nossos resultados mostram a existência de uma diversidade subestimada dentro do gênero Ama- zophrynella. Accepted by M. Vences: 8 Nov. 2013; published: 3 Jan. 2014 79 Licensed under a Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0 Resumen Amazophrynella es un género perteneciente a la familia Bufonidae representada actualmente por tres especies. Ama- zophrynella minuta es considerada como un complejo de especies que se distribuye por todo el bioma amazonico. Este grupo permanece taxonómicamente problemático, siendo la principal dificultad la ausencia de los caracteres diagnósticos en la descripción original de A. minuta, inexistencia de los datos moleculares y comparaciones taxonómicas refinadas a lo largo de su amplia distribución. Describimos una nueva especie del genero Amazophrynella, distribuida en la parte sur- oeste de la región del escudo de Guyana basados en caracteres morfológicos y moleculares. La nueva especie difiere de otras del genero por presentar una nariz triangular ligeramente truncada, textura ventral cubierto por muchos gránulos fi- nos, vientre blanco cubierto por manchas negras y quince automorfias moleculares en el gen 16S rDNA (9% –14%). Adi- cionalmente proveemos una nueva diagnosis del material topotipico de Amazophrynella minuta, incluyendo datos moleculares. Nuestros resultados indican la existencia de una diversidad subestimada dentro del genero Amazophrynella. Introduction Amazophrynella Fouquet, Recoder, Teixeira, Cassimiro, Amaro, Camacho, Damasceno, Carnaval, Moritz, & Rodrigues 2012, is a genus of small, early diverging bufonid frogs (Pramuk et al., 2008; Bocxlaer et al., 2010). The genus is currently represented by three nominal species: Amazophrynella minuta (Melin, 1941), A. bokermanni (Izecksohn, 1993) and A. vote Ávila, Carvalho, Gordo, Kawashita & Morais, 2012 (Frost, 2013). All species of Amazophrynella present a clear sexual size dimorphism, reproduce in seasonal puddles and share this characteristic only with Dendrophryniscus leucomystax (Izecksohn, 1968). Their exclusive habitat is leaf litter and they have a diurnal activity (Magnusson & Hero, 1991; Lima et al., 2006; Ávila et al., 2012). Currently there are no studies describing the bioacoustic patterns of any species of Amazophrynella. Until 2012 species of the genus Amazophrynella were placed in the genus Dendrophryniscus. In 2012 Fouquet et al. (2012a) recognized that species of Dendrophryniscus from the Amazon and Atlantic rainforest represent morphologically and molecularly deeply divergent lineages, and thus the authors proposed a new genus: Amazonella for the Amazonian species, but because this name was already occupied by a genus of Acari, the name had to be changed to Amazophrynella (Fouquet et al., 2012b). The type species of the genus is Amazophrynella minuta (Melin, 1941) described from the Taracuá mission, on the right bank of the Uaupés River, near the Brazil- Colombia-Venezuela border. Melin (1941) collected only six individuals, all part of the type series, which are deposited in the Naturhistoriska Museet, Göteborg, Sweden (NHMG). Possibly due to lack of material other than the type series, and a relatively generalized diagnosis of the species, the name Amazophrynella minuta has been used for individuals from many different populations sampled throughout the Amazonian biome (e.g. Duellman, 1978; Zimmerman & Rodrigues, 1990; Magnusson & Hero,1991; Rodrigues & Duellman,1993; Lima et al., 2006; Fouquet et al., 2012a). However, it is unlikely that many or all of these publications refer to the true A. minuta; what is referred to as A. minuta in the literature likely represents a complex of species (Fouquet et al., 2012a). Herein, we describe a new species of the Amazophrynella minuta species complex using molecular and morphological data. The species is described from municipality of Manaus, state of Amazonas, Brazil. We also rediagnose Amazophrynella minuta based on newly collected specimens from its type locality. Material and methods We analyzed 57 specimens identified as Amazophrynella minuta (Melin, 1941) originating from six localities near Manaus, Brazil deposited in the Collection of Amphibians and Reptiles of the Instituto Nacional de Pesquisas da Amazônia—INPA (INPA-H). This material was compared with twenty specimens (fourteen males and six females, see appendix 1) of recently collected A. minuta from the type locality (Taracuá mission, on the right bank of the Uaupés River, municipality of São Gabriel da Cachoeira, Brazil). Further comparisons were made with photographed material of the two syntypes deposited in the Naturhistoriska Museet, Göteborg, Sweden (NHMG), and the original description of the species (Melin, 1941). In addition to this material we analyzed five specimens of Amazophrynella bokermanni (Izecksohn, 1993) from near the type locality deposited in the Collection of Amphibians and Reptiles of the Instituto Nacional de Pesquisas da Amazônia—INPA, Manaus, Amazonas, Brazil (INPA-H), the holotype of Amazophrynella vote Ávila, Carvalho, Gordo, Kawashita & Morais 2012, deposited in the Coleção Zoológica de Vertebrados of the 80 · Zootaxa 3753 (1) © 2014 Magnolia Press ROJAS ET AL. Universidade Federal de Mato Grosso—UFMT, Cuiabá, Mato Grosso, Brazil (UFMT-A) and seventeen A. vote paratypes deposited in the Collection of
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